package com.sky.aspect;

import com.sky.annotation.AutoFill;
import com.sky.constant.AutoFillConstant;
import com.sky.constant.JwtClaimsConstant;
import com.sky.enumeration.OperationType;
import com.sky.properties.JwtProperties;
import com.sky.utils.JwtUtil;
import io.jsonwebtoken.Claims;
import lombok.extern.slf4j.Slf4j;

import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.Signature;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.aspectj.lang.annotation.Pointcut;
import org.aspectj.lang.reflect.MethodSignature;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;

import javax.servlet.http.HttpServletRequest;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.time.LocalDateTime;

@Aspect
@Component
@Slf4j
public class AutoFillAspect {
    @Autowired
    private HttpServletRequest request;
    @Autowired
    private JwtProperties jwtProperties;
    /**
     * 切入点
     */
    @Pointcut("execution(* com.sky.mapper.*.*(..))&&@annotation(com.sky.annotation.AutoFill)")
    public void autoFillPointCut(){}

    /**
     * 前置通知：在通知中进行公共字段的赋值
     */
    @Before("autoFillPointCut()")
    public void autoFill(JoinPoint joinPoint){
        log.info("开始进行公共字段自动填充");

        //获取被拦截方法上的数据库
        //获得方法签名对象
        MethodSignature signature = (MethodSignature) joinPoint.getSignature();

        //获得方法上面的注解
        AutoFill autoFill = signature.getMethod().getDeclaredAnnotation(AutoFill.class);

        //注解上面的方法
        OperationType operationType = autoFill.value();

        //获取方法的参数
        Object[] args = joinPoint.getArgs();
        if(args==null||args.length==0)
            return;

        Object entity = args[0];

        //准备赋值的数据
        LocalDateTime now=LocalDateTime.now();

        //获取当前用户的id
        String token = request.getHeader("token");
        Claims claims = JwtUtil.parseJWT(jwtProperties.getAdminSecretKey(), token);
        Long empId= Long.valueOf(claims.get(JwtClaimsConstant.EMP_ID).toString());

        //根据不同的操作类型，为对应的属性进行赋值
        if(operationType==OperationType.INSERT){
            try {
                Method setCreateUser = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_CREATE_USER, Long.class);
                Method setUpdateTime = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_TIME, LocalDateTime.class);
                Method setUpdateUser = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_USER, Long.class);
                Method setCreateTime = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_CREATE_TIME, LocalDateTime.class);

                //通过反射为对象属性赋值
                setCreateTime.invoke(entity,now);
                setCreateUser.invoke(entity,empId);
                setUpdateTime.invoke(entity,now);
                setUpdateUser.invoke(entity,empId);
            } catch (Exception e) {
                e.printStackTrace();
            }
        }else if(operationType == OperationType.UPDATE){
            try {

                Method setUpdateUser = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_USER, Long.class);
                Method setUpdateTime = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_TIME, LocalDateTime.class);

                setUpdateTime.invoke(entity,now);
                setUpdateUser.invoke(entity,empId);
            } catch (Exception e) {
                e.printStackTrace();
            }
        }

    }



}
